1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
antiseptic1488 [7]
2 years ago
14

BRAINLIEST

Chemistry
2 answers:
pogonyaev2 years ago
6 0

Answer:

1st opt.

(copper is the only material consisting of a single pure substance)

Explanation:

an element is made up of only one type of atom, and copper (Cu) as you can see is a single pure atom whereas salt (NaCl) and vinegar (C2H4O2) are both made of different elements.

Hope this helps

lesantik [10]2 years ago
5 0

Answer:

copper is the only material composed of a single pure substance

Explanation:

plss mark brainliest

You might be interested in
If an atom has 6 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?
shusha [124]

it would need to gain 2 more for it to achieve a stable configuration

the best way to remember this is the noble gasses all have 8 valence electrons and that they are the most stable elements on the periodic table

4 0
3 years ago
Read 2 more answers
Two samples of sodium chloride with different masses were decomposed into their constituent elements. One sample produced 1.731.
Amanda [17]

Answer:

The answer to your question is letter c) 6.09 g of sodium and 9.38 g of chlorine.

Explanation:

This problem is solve using rule of three

We know that the proportion Sodium to Chloride is 1 to 1 in sodium chloride, so we have to look for this proportion in the options

AM Sodium = 23 g

AM Chlorine = 35.5 g

                 Sodium                                     Chlorine

           23 g ---------------- 1 mol              35.5 g -------------- 1 mol

       1713.73g -------------    x               2666.6 g -------------    x

          x = 1713.73/23 = 74.51                     x = 2666.6/35.5 = 75.12

    These values are very similar, we have to look for the proportion in the options

a)      6.09g of sodium = 0.26 mol

      4,87 g of chlorine = 0.14 mol           These numbers are not very similar

b) We have 0.26 mol of Na

                  0.037 mol of Cl                      This is not the answer

c) We have 0.26 mol of Na

                  0.26 mol of Cl                     These numbers are the same, the proportion is 1:1, this is the answer

d) We have 0.26 mol of Na

                   0.36 mol of Cl                    This is not the answer

8 0
3 years ago
Can someone please help me understand this?
Nataliya [291]

Answer:

French physicist Jacques Charles (1746-1823) studied the effect of temperature on the volume of a gas at constant pressure. Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale. The Kelvin scale must be used because zero on the Kelvin scale corresponds to a complete stop of molecular motion.

alt

Figure 11.5.1: As a container of confined gas is heated, its molecules increase in kinetic energy and push the movable piston outward, resulting in an increase in volume.

Mathematically, the direct relationship of Charles's Law can be represented by the following equation:

V

T

=k

As with Boyle's Law, k is constant only for a given gas sample. The table below shows temperature and volume data for a set amount of gas at a constant pressure. The third column is the constant for this particular data set and is always equal to the volume divided by the Kelvin temperature.

Explanation:

PLEASS MARK ME AS BRAINLIEST ANSWER

4 0
3 years ago
What are the reasons global warming is caused my humans and animals. Plz help 100 points
pantera1 [17]
Global Warming has been increased by living organisms like animals and humans by many ways:

1) We burn fossil fuels, which is very bad for our Environment's health
2) Animals like cows & buffalo produces a lot of methane which causes Global Warming.
3) Animals cut a lot of trees for their products, so increase the amount of Carbon dioxide in the atmosphere, thus increases Global Warming.
4) We don't minimize our dependence on Non-renewable source of energy which 'causes a lot of pollution in the environment

Hope this helps!
8 0
3 years ago
Read 2 more answers
Which of the following would form an anion? He H N B
vagabundo [1.1K]
<h3><u>Answer;</u></h3>

Nitrogen (N)

<h3><u>Explanation;</u></h3>
  • Atoms may lose or gain electrons to achieve stability. Metal atoms lose electrons to attain stable configuration, and as a result they form positively charged ions called cations.
  • <u>Non-metals on the other hand gain electrons to attain stable configuration, and as a result form negatively charged ions called anions.</u>
  • <u>Among the elements given above nitrogen (N) gains electrons to form a negatively charged ion called anion. </u>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Threats faced by the Everglades and the Louisiana wetlands.
    11·1 answer
  • How does your reaction time to the voluntary action of your quadriceps in compare with your reaction time to the simple reaction
    14·1 answer
  • Which of the following is not a physical property of a liquid? A. definite mass B. indefinite volume C. not easily compressed D.
    6·2 answers
  • If you have the element Boron (B) with a mass number of 10, 5 protons, 5 neutrons and 6 electrons, what would be the isotope/ion
    15·1 answer
  • When a pure substance was heated a chemical reaction occurred, and a student obtained another solid and a gas, each of which was
    6·1 answer
  • How many molecules are there in 2.30 grams of NH3
    10·1 answer
  • Write a brief passage describing a neutral atom of nitrogen-14 (N-14). Describe the number of protons, neutrons, and electrons i
    11·2 answers
  • What does sound travel slowest through? Rock, Steel, Air, or Water?
    12·2 answers
  • A hypothesis is tested by ___.
    9·1 answer
  • What is the substance? cdH) (Η) (Η<br> (H)C<br> cco<br> Ή) (Η<br> Η<br> Η
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!